Insulating-tile.



F. LLJ 00000 APPLICATION FILED MMMMMMMMM a.

SSSSSS o z UNITED sTArrEs PATENT. OFFICE.

FRANK L. J OBSON, OF RIGHMON D, VIRGINIA, ASSIGNOR OF ONE-THIRITTO OF RICHMOND, VIRGINIA.

INSULATING-TILE Specification of Letters Patent.

Patented April 20, 1909.

To all whom it may concern:

Be it known that I, FRANK L. JOBSON, a citizen of the United States of America, and aresident of Richmond, county of Henrico,

5 State of Virginia, have invented certain new and useful Improvements in Insulating-Tile, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which- 10 F1%:UI8 1 1s a cross section of one of the tile; and ig. 2 is a vertical section of a wall constructed of tile made according to my inventlon.

The object of this invention is to provide a heat-insulating tile and a method of making the same whereby the tile shall have a maximum degree of insulating capacity, as more full hereinafter set forth.

'Rhe idea of the invention is to make the brick or tile hollow and exhaust the air therefrom, thus converting the space into a vacuum, the insulatin quality of which is well known. As muc of the interior mass or body of the tile is removed as is possible without rendering the tile liable to'collapse by air pressure, and the walls of the tile are rendered permanently air-tight in a suitable manner.

The tile is made of suitable clay aslusual. When made of clay the walls are naturally somewhat porous even after bakin .so in order to close all pores and render t e'walls air-tight I coat the outer surface of the walls with a thick glaze or other coating a after the air is exhausted. The air may be exhausted in an manner. Gne of the walls of each tile may e provided with a small hole (as b) and the tiles exhausted while they. are piled in the glazing oven, the oven being made-air- 40 tight and a suitable exhausting means being employed to exhaust the oven durin the lazing operation, whereby each tile will be ermetically and ermanently sealed by a coating which will fill all the pores of the walls, as well as the escape openin b, and

which will become a permanent an homogeneous part of the tile. It is evident that if the walls of the tile are sufiiciently porous to permit the confined air to escape therethrough the special air-escape opening may stantiall the same result ma be obtained W. J. McAUGHEY,

be dispensed with. It is also obvious that asealed into place by t e fusing by simp y heating u a non-airtight glazing oven to a sufficient y high temperature to consume and drive out the air from the tile and'keep it out until the walls are made airtight by the fusing of the glazing material and it is'beli'eved, inasmuch as the temperature em loyed for the glazing process is a ve big one, that that temperature will be s1 cient for that purpose, whereby the tile will be exhausted to a ractical de res and be rendered air-tight simply by t e usual glazing o eration.

It will e observed that a wall constructed of my tile will possess a very high degree of non-conductivity and inasmuch as the units of which the wall is constructed are entirely independent the destruction of the vacuum 1n one will not afi'ect the heat-resistin qualities of the others. It will'be observe also that instead of exhausting the tile in bulk, in either of the ways described, they may-be individually'exhausted and plugged after or during the glazing process.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An insulatin tile or brick made of baked clay, said ti e being made hollow and its interior bein exhausted of its air and the exterior of the tile being entirely coated with an air-impervious coatmg.

2'. A hollow baked clay tile having the airexhausted from its interlor to a rarefied condition, the exterior of the walls of the tile being provided with a continuous air-impervious glaze baked into the clay of the tile.

In testimony whereof I hereunto afi'ix my signature in the presence of two witnesses this 18 day of May 1908.

i FRANK L. JOBSON.

Witnesses:

' L. B. Harness,

O. D. DAVIS. 

